/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:26:43,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:26:43,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:26:43,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:26:43,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:26:43,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:26:43,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:26:43,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:26:43,679 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:26:43,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:26:43,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:26:43,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:26:43,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:26:43,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:26:43,681 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:26:43,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:26:43,681 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:26:43,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:26:43,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:26:43,682 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:26:43,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:26:43,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:26:43,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:26:43,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:26:43,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:26:43,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:26:43,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:26:43,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:26:43,684 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:26:43,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:26:43,684 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:26:43,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:26:43,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:26:43,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:26:43,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:26:43,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:26:43,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:26:43,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:26:43,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:26:43,896 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:26:43,896 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:26:43,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-01 00:26:44,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:26:45,220 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:26:45,229 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-01 00:26:45,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618009b77/7f0c6f7c3f4947a18ce2ef0a401491d5/FLAG29df3eaaf [2023-04-01 00:26:45,253 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618009b77/7f0c6f7c3f4947a18ce2ef0a401491d5 [2023-04-01 00:26:45,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:26:45,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:26:45,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:26:45,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:26:45,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:26:45,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:26:45" (1/1) ... [2023-04-01 00:26:45,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501e3830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:45, skipping insertion in model container [2023-04-01 00:26:45,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:26:45" (1/1) ... [2023-04-01 00:26:45,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:26:45,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:26:45,574 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8637,8650] [2023-04-01 00:26:45,631 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15862,15875] [2023-04-01 00:26:45,638 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18059,18072] [2023-04-01 00:26:45,672 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[19083,19096] [2023-04-01 00:26:45,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:26:45,856 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:26:45,894 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8637,8650] [2023-04-01 00:26:45,913 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15862,15875] [2023-04-01 00:26:45,921 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18059,18072] [2023-04-01 00:26:45,924 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[19083,19096] [2023-04-01 00:26:46,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:26:46,051 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:26:46,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46 WrapperNode [2023-04-01 00:26:46,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:26:46,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:26:46,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:26:46,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:26:46,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,126 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:26:46,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:26:46,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:26:46,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:26:46,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (1/1) ... [2023-04-01 00:26:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:26:46,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:26:46,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:26:46,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:26:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:26:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:26:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:26:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:26:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:26:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:26:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:26:46,361 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:26:46,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:26:47,273 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:26:47,353 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:26:47,354 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:26:47,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:26:47 BoogieIcfgContainer [2023-04-01 00:26:47,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:26:47,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:26:47,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:26:47,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:26:47,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:26:45" (1/3) ... [2023-04-01 00:26:47,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b17da91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:26:47, skipping insertion in model container [2023-04-01 00:26:47,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:46" (2/3) ... [2023-04-01 00:26:47,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b17da91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:26:47, skipping insertion in model container [2023-04-01 00:26:47,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:26:47" (3/3) ... [2023-04-01 00:26:47,364 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-01 00:26:47,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:26:47,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-01 00:26:47,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:26:47,434 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7001d175, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:26:47,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-01 00:26:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 428 states have (on average 1.852803738317757) internal successors, (793), 432 states have internal predecessors, (793), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:26:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:26:47,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:47,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:47,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:47,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1495070188, now seen corresponding path program 1 times [2023-04-01 00:26:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061899489] [2023-04-01 00:26:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:47,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:47,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061899489] [2023-04-01 00:26:47,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061899489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:47,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:47,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:26:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299438555] [2023-04-01 00:26:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:26:47,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:26:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:26:47,970 INFO L87 Difference]: Start difference. First operand has 437 states, 428 states have (on average 1.852803738317757) internal successors, (793), 432 states have internal predecessors, (793), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:48,138 INFO L93 Difference]: Finished difference Result 661 states and 1152 transitions. [2023-04-01 00:26:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:26:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 00:26:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:48,157 INFO L225 Difference]: With dead ends: 661 [2023-04-01 00:26:48,157 INFO L226 Difference]: Without dead ends: 528 [2023-04-01 00:26:48,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:26:48,165 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 401 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:48,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1319 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:26:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-04-01 00:26:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 522. [2023-04-01 00:26:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 515 states have (on average 1.3067961165048543) internal successors, (673), 518 states have internal predecessors, (673), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 676 transitions. [2023-04-01 00:26:48,235 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 676 transitions. Word has length 54 [2023-04-01 00:26:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:48,236 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 676 transitions. [2023-04-01 00:26:48,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 676 transitions. [2023-04-01 00:26:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:26:48,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:48,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:48,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:26:48,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:48,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash -441009604, now seen corresponding path program 1 times [2023-04-01 00:26:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:48,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913590789] [2023-04-01 00:26:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:48,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:48,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913590789] [2023-04-01 00:26:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913590789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:48,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:48,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:26:48,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845541369] [2023-04-01 00:26:48,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:48,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:26:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:26:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:26:48,471 INFO L87 Difference]: Start difference. First operand 522 states and 676 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:48,784 INFO L93 Difference]: Finished difference Result 929 states and 1223 transitions. [2023-04-01 00:26:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:26:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 00:26:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:48,787 INFO L225 Difference]: With dead ends: 929 [2023-04-01 00:26:48,787 INFO L226 Difference]: Without dead ends: 620 [2023-04-01 00:26:48,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:26:48,789 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1593 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:48,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 361 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:26:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-04-01 00:26:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 613. [2023-04-01 00:26:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 606 states have (on average 1.3003300330033003) internal successors, (788), 609 states have internal predecessors, (788), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 791 transitions. [2023-04-01 00:26:48,820 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 791 transitions. Word has length 54 [2023-04-01 00:26:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:48,820 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 791 transitions. [2023-04-01 00:26:48,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 791 transitions. [2023-04-01 00:26:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:26:48,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:48,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:48,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:26:48,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:48,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -334968673, now seen corresponding path program 1 times [2023-04-01 00:26:48,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:48,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304658133] [2023-04-01 00:26:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:48,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:48,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304658133] [2023-04-01 00:26:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304658133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:48,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:48,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:26:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772233242] [2023-04-01 00:26:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:26:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:26:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:26:48,889 INFO L87 Difference]: Start difference. First operand 613 states and 791 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:48,984 INFO L93 Difference]: Finished difference Result 1090 states and 1460 transitions. [2023-04-01 00:26:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:26:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 00:26:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:48,989 INFO L225 Difference]: With dead ends: 1090 [2023-04-01 00:26:48,989 INFO L226 Difference]: Without dead ends: 846 [2023-04-01 00:26:48,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:26:48,992 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 266 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:48,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 809 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:26:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-04-01 00:26:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 839. [2023-04-01 00:26:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 832 states have (on average 1.3269230769230769) internal successors, (1104), 835 states have internal predecessors, (1104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1107 transitions. [2023-04-01 00:26:49,077 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1107 transitions. Word has length 54 [2023-04-01 00:26:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:49,079 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1107 transitions. [2023-04-01 00:26:49,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1107 transitions. [2023-04-01 00:26:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:26:49,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:49,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:49,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:26:49,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:49,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 183427920, now seen corresponding path program 1 times [2023-04-01 00:26:49,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:49,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678020310] [2023-04-01 00:26:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:49,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:49,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678020310] [2023-04-01 00:26:49,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678020310] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:49,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:49,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:26:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990675614] [2023-04-01 00:26:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:49,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:26:49,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:26:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:26:49,206 INFO L87 Difference]: Start difference. First operand 839 states and 1107 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:49,496 INFO L93 Difference]: Finished difference Result 1843 states and 2498 transitions. [2023-04-01 00:26:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:26:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 00:26:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:49,500 INFO L225 Difference]: With dead ends: 1843 [2023-04-01 00:26:49,500 INFO L226 Difference]: Without dead ends: 1160 [2023-04-01 00:26:49,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:26:49,506 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1421 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:49,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 350 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:26:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2023-04-01 00:26:49,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1154. [2023-04-01 00:26:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1147 states have (on average 1.3548387096774193) internal successors, (1554), 1150 states have internal predecessors, (1554), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1557 transitions. [2023-04-01 00:26:49,569 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1557 transitions. Word has length 54 [2023-04-01 00:26:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:49,570 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1557 transitions. [2023-04-01 00:26:49,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1557 transitions. [2023-04-01 00:26:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 00:26:49,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:49,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:49,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:26:49,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:49,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:49,572 INFO L85 PathProgramCache]: Analyzing trace with hash 80030381, now seen corresponding path program 1 times [2023-04-01 00:26:49,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:49,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531862904] [2023-04-01 00:26:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:49,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:49,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531862904] [2023-04-01 00:26:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531862904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:49,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:49,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:26:49,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959802646] [2023-04-01 00:26:49,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:26:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:26:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:26:49,732 INFO L87 Difference]: Start difference. First operand 1154 states and 1557 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:50,049 INFO L93 Difference]: Finished difference Result 2968 states and 4085 transitions. [2023-04-01 00:26:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:26:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 00:26:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:50,054 INFO L225 Difference]: With dead ends: 2968 [2023-04-01 00:26:50,054 INFO L226 Difference]: Without dead ends: 1905 [2023-04-01 00:26:50,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:26:50,056 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1195 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:50,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 319 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:26:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2023-04-01 00:26:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1899. [2023-04-01 00:26:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1892 states have (on average 1.3594080338266386) internal successors, (2572), 1895 states have internal predecessors, (2572), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2575 transitions. [2023-04-01 00:26:50,224 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2575 transitions. Word has length 55 [2023-04-01 00:26:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:50,224 INFO L495 AbstractCegarLoop]: Abstraction has 1899 states and 2575 transitions. [2023-04-01 00:26:50,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2575 transitions. [2023-04-01 00:26:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:26:50,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:50,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:50,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:26:50,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:50,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash 583459859, now seen corresponding path program 1 times [2023-04-01 00:26:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:50,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910248199] [2023-04-01 00:26:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:50,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:50,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910248199] [2023-04-01 00:26:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910248199] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:26:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912769816] [2023-04-01 00:26:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:26:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:26:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:26:50,281 INFO L87 Difference]: Start difference. First operand 1899 states and 2575 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:50,595 INFO L93 Difference]: Finished difference Result 4863 states and 6619 transitions. [2023-04-01 00:26:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:26:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:26:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:50,604 INFO L225 Difference]: With dead ends: 4863 [2023-04-01 00:26:50,604 INFO L226 Difference]: Without dead ends: 3135 [2023-04-01 00:26:50,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:26:50,607 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 251 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:50,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 677 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:26:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2023-04-01 00:26:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3129. [2023-04-01 00:26:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 3122 states have (on average 1.33888532991672) internal successors, (4180), 3125 states have internal predecessors, (4180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4183 transitions. [2023-04-01 00:26:50,850 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4183 transitions. Word has length 56 [2023-04-01 00:26:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:50,850 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 4183 transitions. [2023-04-01 00:26:50,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4183 transitions. [2023-04-01 00:26:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:26:50,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:50,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:50,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:26:50,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:50,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash 87247720, now seen corresponding path program 1 times [2023-04-01 00:26:50,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:50,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702948806] [2023-04-01 00:26:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:50,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:50,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702948806] [2023-04-01 00:26:50,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702948806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:50,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:50,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:26:50,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858429150] [2023-04-01 00:26:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:50,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:26:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:26:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:26:50,993 INFO L87 Difference]: Start difference. First operand 3129 states and 4183 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:52,157 INFO L93 Difference]: Finished difference Result 10424 states and 14093 transitions. [2023-04-01 00:26:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:26:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:26:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:52,182 INFO L225 Difference]: With dead ends: 10424 [2023-04-01 00:26:52,182 INFO L226 Difference]: Without dead ends: 9241 [2023-04-01 00:26:52,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:26:52,186 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 2325 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:52,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 529 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:26:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2023-04-01 00:26:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 3143. [2023-04-01 00:26:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3136 states have (on average 1.3386479591836735) internal successors, (4198), 3139 states have internal predecessors, (4198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 4201 transitions. [2023-04-01 00:26:52,536 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 4201 transitions. Word has length 57 [2023-04-01 00:26:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:52,537 INFO L495 AbstractCegarLoop]: Abstraction has 3143 states and 4201 transitions. [2023-04-01 00:26:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 4201 transitions. [2023-04-01 00:26:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:26:52,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:52,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:52,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:26:52,539 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:52,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1572039709, now seen corresponding path program 1 times [2023-04-01 00:26:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:52,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647810528] [2023-04-01 00:26:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:52,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:52,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647810528] [2023-04-01 00:26:52,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647810528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:52,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:52,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:26:52,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677490996] [2023-04-01 00:26:52,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:52,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:26:52,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:26:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:26:52,654 INFO L87 Difference]: Start difference. First operand 3143 states and 4201 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:54,376 INFO L93 Difference]: Finished difference Result 11424 states and 15573 transitions. [2023-04-01 00:26:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:26:54,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:26:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:54,409 INFO L225 Difference]: With dead ends: 11424 [2023-04-01 00:26:54,410 INFO L226 Difference]: Without dead ends: 10412 [2023-04-01 00:26:54,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:26:54,415 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1803 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:54,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1803 Valid, 623 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:26:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2023-04-01 00:26:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 3165. [2023-04-01 00:26:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3158 states have (on average 1.3391386953768207) internal successors, (4229), 3161 states have internal predecessors, (4229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 4232 transitions. [2023-04-01 00:26:54,835 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 4232 transitions. Word has length 57 [2023-04-01 00:26:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:54,835 INFO L495 AbstractCegarLoop]: Abstraction has 3165 states and 4232 transitions. [2023-04-01 00:26:54,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 4232 transitions. [2023-04-01 00:26:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:26:54,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:54,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:54,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:26:54,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:54,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash -112438110, now seen corresponding path program 1 times [2023-04-01 00:26:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:54,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444492739] [2023-04-01 00:26:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:54,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444492739] [2023-04-01 00:26:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444492739] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:54,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:54,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:26:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144990149] [2023-04-01 00:26:54,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:54,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:26:54,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:26:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:26:54,960 INFO L87 Difference]: Start difference. First operand 3165 states and 4232 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:57,331 INFO L93 Difference]: Finished difference Result 13690 states and 18641 transitions. [2023-04-01 00:26:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:26:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:26:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:57,357 INFO L225 Difference]: With dead ends: 13690 [2023-04-01 00:26:57,357 INFO L226 Difference]: Without dead ends: 12560 [2023-04-01 00:26:57,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:26:57,365 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 2656 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2656 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:57,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2656 Valid, 563 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:26:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12560 states. [2023-04-01 00:26:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12560 to 3199. [2023-04-01 00:26:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3192 states have (on average 1.338659147869674) internal successors, (4273), 3195 states have internal predecessors, (4273), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4276 transitions. [2023-04-01 00:26:57,894 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4276 transitions. Word has length 57 [2023-04-01 00:26:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:57,894 INFO L495 AbstractCegarLoop]: Abstraction has 3199 states and 4276 transitions. [2023-04-01 00:26:57,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4276 transitions. [2023-04-01 00:26:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:26:57,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:57,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:57,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:26:57,896 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:57,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -967421316, now seen corresponding path program 1 times [2023-04-01 00:26:57,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:57,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949723839] [2023-04-01 00:26:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:58,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949723839] [2023-04-01 00:26:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949723839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:58,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:58,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:26:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522815787] [2023-04-01 00:26:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:26:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:26:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:26:58,168 INFO L87 Difference]: Start difference. First operand 3199 states and 4276 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:59,956 INFO L93 Difference]: Finished difference Result 6553 states and 8780 transitions. [2023-04-01 00:26:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:26:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:26:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:59,971 INFO L225 Difference]: With dead ends: 6553 [2023-04-01 00:26:59,971 INFO L226 Difference]: Without dead ends: 6548 [2023-04-01 00:26:59,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:26:59,973 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1892 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:59,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1892 Valid, 1045 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:26:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6548 states. [2023-04-01 00:27:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6548 to 3199. [2023-04-01 00:27:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 3192 states have (on average 1.338032581453634) internal successors, (4271), 3195 states have internal predecessors, (4271), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4274 transitions. [2023-04-01 00:27:00,513 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4274 transitions. Word has length 58 [2023-04-01 00:27:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:00,513 INFO L495 AbstractCegarLoop]: Abstraction has 3199 states and 4274 transitions. [2023-04-01 00:27:00,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4274 transitions. [2023-04-01 00:27:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:27:00,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:00,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:00,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:27:00,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:00,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash 86639268, now seen corresponding path program 1 times [2023-04-01 00:27:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:00,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700096158] [2023-04-01 00:27:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:00,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:00,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700096158] [2023-04-01 00:27:00,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700096158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:00,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:00,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:27:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996750276] [2023-04-01 00:27:00,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:27:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:00,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:27:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:27:00,750 INFO L87 Difference]: Start difference. First operand 3199 states and 4274 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:02,773 INFO L93 Difference]: Finished difference Result 8774 states and 11809 transitions. [2023-04-01 00:27:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:27:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:27:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:02,794 INFO L225 Difference]: With dead ends: 8774 [2023-04-01 00:27:02,794 INFO L226 Difference]: Without dead ends: 6720 [2023-04-01 00:27:02,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:27:02,799 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1899 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:02,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 1098 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:27:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2023-04-01 00:27:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 3170. [2023-04-01 00:27:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3163 states have (on average 1.3373379702813784) internal successors, (4230), 3166 states have internal predecessors, (4230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4233 transitions. [2023-04-01 00:27:03,465 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4233 transitions. Word has length 58 [2023-04-01 00:27:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:03,465 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 4233 transitions. [2023-04-01 00:27:03,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4233 transitions. [2023-04-01 00:27:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:27:03,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:03,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:03,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:27:03,468 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:03,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2110024847, now seen corresponding path program 1 times [2023-04-01 00:27:03,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:03,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207538069] [2023-04-01 00:27:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:03,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207538069] [2023-04-01 00:27:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207538069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:03,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:03,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 00:27:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738031249] [2023-04-01 00:27:03,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:03,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 00:27:03,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 00:27:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:27:03,680 INFO L87 Difference]: Start difference. First operand 3170 states and 4233 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:05,411 INFO L93 Difference]: Finished difference Result 7557 states and 10202 transitions. [2023-04-01 00:27:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:27:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:27:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:05,420 INFO L225 Difference]: With dead ends: 7557 [2023-04-01 00:27:05,420 INFO L226 Difference]: Without dead ends: 5361 [2023-04-01 00:27:05,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:27:05,425 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 1958 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:05,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1958 Valid, 764 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2023-04-01 00:27:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 3089. [2023-04-01 00:27:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3082 states have (on average 1.335820895522388) internal successors, (4117), 3085 states have internal predecessors, (4117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4120 transitions. [2023-04-01 00:27:06,094 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4120 transitions. Word has length 58 [2023-04-01 00:27:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:06,094 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4120 transitions. [2023-04-01 00:27:06,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4120 transitions. [2023-04-01 00:27:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 00:27:06,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:06,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:27:06,097 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:06,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash -878484794, now seen corresponding path program 1 times [2023-04-01 00:27:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448692238] [2023-04-01 00:27:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:06,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:06,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448692238] [2023-04-01 00:27:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448692238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:06,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:06,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:06,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676910106] [2023-04-01 00:27:06,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:06,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:06,144 INFO L87 Difference]: Start difference. First operand 3089 states and 4120 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:06,831 INFO L93 Difference]: Finished difference Result 4233 states and 5667 transitions. [2023-04-01 00:27:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:06,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 00:27:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:06,836 INFO L225 Difference]: With dead ends: 4233 [2023-04-01 00:27:06,836 INFO L226 Difference]: Without dead ends: 3096 [2023-04-01 00:27:06,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:06,838 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 184 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:06,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 684 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2023-04-01 00:27:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 3089. [2023-04-01 00:27:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3082 states have (on average 1.3202465931213498) internal successors, (4069), 3085 states have internal predecessors, (4069), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4072 transitions. [2023-04-01 00:27:07,469 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4072 transitions. Word has length 59 [2023-04-01 00:27:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:07,469 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4072 transitions. [2023-04-01 00:27:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4072 transitions. [2023-04-01 00:27:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 00:27:07,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:07,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:07,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:27:07,472 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:07,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -768728098, now seen corresponding path program 1 times [2023-04-01 00:27:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908234719] [2023-04-01 00:27:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:07,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908234719] [2023-04-01 00:27:07,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908234719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:07,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:07,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:07,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303810101] [2023-04-01 00:27:07,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:07,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:07,522 INFO L87 Difference]: Start difference. First operand 3089 states and 4072 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:08,229 INFO L93 Difference]: Finished difference Result 4296 states and 5685 transitions. [2023-04-01 00:27:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 00:27:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:08,234 INFO L225 Difference]: With dead ends: 4296 [2023-04-01 00:27:08,234 INFO L226 Difference]: Without dead ends: 3095 [2023-04-01 00:27:08,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:08,237 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 200 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:08,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 690 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2023-04-01 00:27:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3089. [2023-04-01 00:27:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3082 states have (on average 1.3059701492537314) internal successors, (4025), 3085 states have internal predecessors, (4025), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4028 transitions. [2023-04-01 00:27:08,915 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4028 transitions. Word has length 59 [2023-04-01 00:27:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:08,915 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4028 transitions. [2023-04-01 00:27:08,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4028 transitions. [2023-04-01 00:27:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 00:27:08,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:08,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:08,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 00:27:08,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:08,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash -343722844, now seen corresponding path program 1 times [2023-04-01 00:27:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544803116] [2023-04-01 00:27:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:08,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:08,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544803116] [2023-04-01 00:27:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544803116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:08,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:08,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:08,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021150311] [2023-04-01 00:27:08,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:08,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:08,965 INFO L87 Difference]: Start difference. First operand 3089 states and 4028 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:09,697 INFO L93 Difference]: Finished difference Result 4329 states and 5672 transitions. [2023-04-01 00:27:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 00:27:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:09,701 INFO L225 Difference]: With dead ends: 4329 [2023-04-01 00:27:09,702 INFO L226 Difference]: Without dead ends: 3080 [2023-04-01 00:27:09,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:09,704 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 220 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:09,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 710 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2023-04-01 00:27:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3074. [2023-04-01 00:27:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3067 states have (on average 1.286925334202804) internal successors, (3947), 3070 states have internal predecessors, (3947), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 3950 transitions. [2023-04-01 00:27:10,397 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 3950 transitions. Word has length 59 [2023-04-01 00:27:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:10,397 INFO L495 AbstractCegarLoop]: Abstraction has 3074 states and 3950 transitions. [2023-04-01 00:27:10,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 3950 transitions. [2023-04-01 00:27:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:27:10,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:10,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 00:27:10,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:10,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1423291097, now seen corresponding path program 1 times [2023-04-01 00:27:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675055648] [2023-04-01 00:27:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:10,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:10,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675055648] [2023-04-01 00:27:10,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675055648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:10,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:10,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780573940] [2023-04-01 00:27:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:10,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:10,446 INFO L87 Difference]: Start difference. First operand 3074 states and 3950 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:11,307 INFO L93 Difference]: Finished difference Result 4866 states and 6294 transitions. [2023-04-01 00:27:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:27:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:11,311 INFO L225 Difference]: With dead ends: 4866 [2023-04-01 00:27:11,311 INFO L226 Difference]: Without dead ends: 3468 [2023-04-01 00:27:11,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:11,314 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 288 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:11,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 492 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2023-04-01 00:27:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2864. [2023-04-01 00:27:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2857 states have (on average 1.2842142107105354) internal successors, (3669), 2860 states have internal predecessors, (3669), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3672 transitions. [2023-04-01 00:27:12,034 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3672 transitions. Word has length 60 [2023-04-01 00:27:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:12,034 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 3672 transitions. [2023-04-01 00:27:12,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3672 transitions. [2023-04-01 00:27:12,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 00:27:12,036 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:12,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:12,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 00:27:12,036 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:12,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash 344858694, now seen corresponding path program 1 times [2023-04-01 00:27:12,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:12,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863013445] [2023-04-01 00:27:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:12,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:12,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:12,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863013445] [2023-04-01 00:27:12,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863013445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:12,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:12,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-01 00:27:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148592883] [2023-04-01 00:27:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 00:27:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 00:27:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:27:12,891 INFO L87 Difference]: Start difference. First operand 2864 states and 3672 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:16,031 INFO L93 Difference]: Finished difference Result 4535 states and 5797 transitions. [2023-04-01 00:27:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 00:27:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-01 00:27:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:16,036 INFO L225 Difference]: With dead ends: 4535 [2023-04-01 00:27:16,036 INFO L226 Difference]: Without dead ends: 4531 [2023-04-01 00:27:16,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:27:16,038 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 2433 mSDsluCounter, 4807 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 5250 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:16,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2433 Valid, 5250 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 00:27:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2023-04-01 00:27:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 2864. [2023-04-01 00:27:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2857 states have (on average 1.2838641932096604) internal successors, (3668), 2860 states have internal predecessors, (3668), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3671 transitions. [2023-04-01 00:27:16,812 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3671 transitions. Word has length 61 [2023-04-01 00:27:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:16,812 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 3671 transitions. [2023-04-01 00:27:16,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3671 transitions. [2023-04-01 00:27:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 00:27:16,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:16,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:16,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 00:27:16,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:16,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1361898426, now seen corresponding path program 1 times [2023-04-01 00:27:16,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:16,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814495025] [2023-04-01 00:27:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:16,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:17,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814495025] [2023-04-01 00:27:17,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814495025] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:17,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:17,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:27:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623495776] [2023-04-01 00:27:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:17,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:27:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:27:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:27:17,173 INFO L87 Difference]: Start difference. First operand 2864 states and 3671 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:19,156 INFO L93 Difference]: Finished difference Result 4775 states and 6149 transitions. [2023-04-01 00:27:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 00:27:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-01 00:27:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:19,161 INFO L225 Difference]: With dead ends: 4775 [2023-04-01 00:27:19,161 INFO L226 Difference]: Without dead ends: 4239 [2023-04-01 00:27:19,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:27:19,165 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 1609 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:19,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 2159 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:27:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2023-04-01 00:27:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 2806. [2023-04-01 00:27:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2800 states have (on average 1.2842857142857143) internal successors, (3596), 2802 states have internal predecessors, (3596), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 3599 transitions. [2023-04-01 00:27:20,014 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 3599 transitions. Word has length 61 [2023-04-01 00:27:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:20,014 INFO L495 AbstractCegarLoop]: Abstraction has 2806 states and 3599 transitions. [2023-04-01 00:27:20,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 3599 transitions. [2023-04-01 00:27:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 00:27:20,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:20,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 00:27:20,016 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:20,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1560350621, now seen corresponding path program 1 times [2023-04-01 00:27:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:20,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116852801] [2023-04-01 00:27:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:20,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116852801] [2023-04-01 00:27:20,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116852801] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:20,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:20,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408373577] [2023-04-01 00:27:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:20,060 INFO L87 Difference]: Start difference. First operand 2806 states and 3599 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:21,142 INFO L93 Difference]: Finished difference Result 4726 states and 6072 transitions. [2023-04-01 00:27:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-01 00:27:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:21,146 INFO L225 Difference]: With dead ends: 4726 [2023-04-01 00:27:21,146 INFO L226 Difference]: Without dead ends: 3253 [2023-04-01 00:27:21,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:21,148 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 223 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:21,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 356 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2023-04-01 00:27:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 2649. [2023-04-01 00:27:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2644 states have (on average 1.2829046898638428) internal successors, (3392), 2645 states have internal predecessors, (3392), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3395 transitions. [2023-04-01 00:27:21,970 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3395 transitions. Word has length 61 [2023-04-01 00:27:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:21,970 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 3395 transitions. [2023-04-01 00:27:21,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3395 transitions. [2023-04-01 00:27:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 00:27:21,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:21,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:21,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 00:27:21,972 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:21,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1381796618, now seen corresponding path program 1 times [2023-04-01 00:27:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:21,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573583219] [2023-04-01 00:27:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:22,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:22,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573583219] [2023-04-01 00:27:22,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573583219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:22,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:22,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:22,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123047056] [2023-04-01 00:27:22,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:22,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:22,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:22,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:22,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:22,398 INFO L87 Difference]: Start difference. First operand 2649 states and 3395 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:24,525 INFO L93 Difference]: Finished difference Result 4540 states and 5831 transitions. [2023-04-01 00:27:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:27:24,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 00:27:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:24,530 INFO L225 Difference]: With dead ends: 4540 [2023-04-01 00:27:24,530 INFO L226 Difference]: Without dead ends: 3992 [2023-04-01 00:27:24,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-04-01 00:27:24,531 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 1285 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 2944 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:24,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 2944 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2023-04-01 00:27:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 2603. [2023-04-01 00:27:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2599 states have (on average 1.2835706040784918) internal successors, (3336), 2599 states have internal predecessors, (3336), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3339 transitions. [2023-04-01 00:27:25,422 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3339 transitions. Word has length 62 [2023-04-01 00:27:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:25,422 INFO L495 AbstractCegarLoop]: Abstraction has 2603 states and 3339 transitions. [2023-04-01 00:27:25,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3339 transitions. [2023-04-01 00:27:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 00:27:25,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:25,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:25,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 00:27:25,424 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:25,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:25,424 INFO L85 PathProgramCache]: Analyzing trace with hash 46981039, now seen corresponding path program 1 times [2023-04-01 00:27:25,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:25,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077385117] [2023-04-01 00:27:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:25,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:25,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077385117] [2023-04-01 00:27:25,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077385117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:25,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:25,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930263858] [2023-04-01 00:27:25,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:25,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:25,506 INFO L87 Difference]: Start difference. First operand 2603 states and 3339 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:26,400 INFO L93 Difference]: Finished difference Result 2609 states and 3342 transitions. [2023-04-01 00:27:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-04-01 00:27:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:26,403 INFO L225 Difference]: With dead ends: 2609 [2023-04-01 00:27:26,403 INFO L226 Difference]: Without dead ends: 2250 [2023-04-01 00:27:26,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:26,404 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 423 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:26,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 669 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2023-04-01 00:27:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2246. [2023-04-01 00:27:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2242 states have (on average 1.2818911685994647) internal successors, (2874), 2242 states have internal predecessors, (2874), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 2877 transitions. [2023-04-01 00:27:27,212 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 2877 transitions. Word has length 63 [2023-04-01 00:27:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:27,212 INFO L495 AbstractCegarLoop]: Abstraction has 2246 states and 2877 transitions. [2023-04-01 00:27:27,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 2877 transitions. [2023-04-01 00:27:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 00:27:27,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:27,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:27,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 00:27:27,214 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:27,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash -222079138, now seen corresponding path program 1 times [2023-04-01 00:27:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:27,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313106467] [2023-04-01 00:27:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:27,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:27,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:27,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313106467] [2023-04-01 00:27:27,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313106467] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:27,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:27,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:27,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102512088] [2023-04-01 00:27:27,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:27,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:27,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:27,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:27,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:27,298 INFO L87 Difference]: Start difference. First operand 2246 states and 2877 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:28,453 INFO L93 Difference]: Finished difference Result 4168 states and 5437 transitions. [2023-04-01 00:27:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-01 00:27:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:28,457 INFO L225 Difference]: With dead ends: 4168 [2023-04-01 00:27:28,457 INFO L226 Difference]: Without dead ends: 3056 [2023-04-01 00:27:28,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:28,459 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 101 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:28,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 466 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2023-04-01 00:27:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2862. [2023-04-01 00:27:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2858 states have (on average 1.275367389783065) internal successors, (3645), 2858 states have internal predecessors, (3645), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 3648 transitions. [2023-04-01 00:27:29,538 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 3648 transitions. Word has length 64 [2023-04-01 00:27:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:29,539 INFO L495 AbstractCegarLoop]: Abstraction has 2862 states and 3648 transitions. [2023-04-01 00:27:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 3648 transitions. [2023-04-01 00:27:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 00:27:29,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:29,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:29,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 00:27:29,540 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:29,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1815812089, now seen corresponding path program 1 times [2023-04-01 00:27:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:29,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317280998] [2023-04-01 00:27:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:29,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:29,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317280998] [2023-04-01 00:27:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317280998] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:29,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618507667] [2023-04-01 00:27:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:29,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:29,629 INFO L87 Difference]: Start difference. First operand 2862 states and 3648 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:31,244 INFO L93 Difference]: Finished difference Result 5680 states and 7381 transitions. [2023-04-01 00:27:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-01 00:27:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:31,250 INFO L225 Difference]: With dead ends: 5680 [2023-04-01 00:27:31,250 INFO L226 Difference]: Without dead ends: 4122 [2023-04-01 00:27:31,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:31,252 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 90 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:31,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 454 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2023-04-01 00:27:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3712. [2023-04-01 00:27:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3712 states, 3708 states have (on average 1.2707659115426106) internal successors, (4712), 3708 states have internal predecessors, (4712), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3712 states to 3712 states and 4715 transitions. [2023-04-01 00:27:32,715 INFO L78 Accepts]: Start accepts. Automaton has 3712 states and 4715 transitions. Word has length 67 [2023-04-01 00:27:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:32,715 INFO L495 AbstractCegarLoop]: Abstraction has 3712 states and 4715 transitions. [2023-04-01 00:27:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3712 states and 4715 transitions. [2023-04-01 00:27:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 00:27:32,717 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:32,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 00:27:32,717 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:32,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1915493494, now seen corresponding path program 1 times [2023-04-01 00:27:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:32,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290608164] [2023-04-01 00:27:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:32,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:32,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290608164] [2023-04-01 00:27:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290608164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:32,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:32,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:32,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391314276] [2023-04-01 00:27:32,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:32,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:32,795 INFO L87 Difference]: Start difference. First operand 3712 states and 4715 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:35,016 INFO L93 Difference]: Finished difference Result 7660 states and 9895 transitions. [2023-04-01 00:27:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:35,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-01 00:27:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:35,023 INFO L225 Difference]: With dead ends: 7660 [2023-04-01 00:27:35,023 INFO L226 Difference]: Without dead ends: 5552 [2023-04-01 00:27:35,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:35,046 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 77 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:35,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 438 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2023-04-01 00:27:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5030. [2023-04-01 00:27:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5026 states have (on average 1.2652208515718264) internal successors, (6359), 5026 states have internal predecessors, (6359), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 6362 transitions. [2023-04-01 00:27:37,115 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 6362 transitions. Word has length 71 [2023-04-01 00:27:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:37,115 INFO L495 AbstractCegarLoop]: Abstraction has 5030 states and 6362 transitions. [2023-04-01 00:27:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 6362 transitions. [2023-04-01 00:27:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 00:27:37,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:37,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:37,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-01 00:27:37,121 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:37,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2013633636, now seen corresponding path program 1 times [2023-04-01 00:27:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:37,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931380342] [2023-04-01 00:27:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:37,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:37,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931380342] [2023-04-01 00:27:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931380342] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:37,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:27:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275920083] [2023-04-01 00:27:37,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:37,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:27:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:27:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:27:37,616 INFO L87 Difference]: Start difference. First operand 5030 states and 6362 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:42,372 INFO L93 Difference]: Finished difference Result 10109 states and 12894 transitions. [2023-04-01 00:27:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 00:27:42,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-01 00:27:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:42,382 INFO L225 Difference]: With dead ends: 10109 [2023-04-01 00:27:42,382 INFO L226 Difference]: Without dead ends: 10107 [2023-04-01 00:27:42,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:27:42,384 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1235 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:42,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 1402 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10107 states. [2023-04-01 00:27:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10107 to 6103. [2023-04-01 00:27:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6099 states have (on average 1.262829972126578) internal successors, (7702), 6099 states have internal predecessors, (7702), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 7705 transitions. [2023-04-01 00:27:45,088 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 7705 transitions. Word has length 75 [2023-04-01 00:27:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:45,088 INFO L495 AbstractCegarLoop]: Abstraction has 6103 states and 7705 transitions. [2023-04-01 00:27:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 7705 transitions. [2023-04-01 00:27:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:27:45,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:45,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-01 00:27:45,091 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:45,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1868356010, now seen corresponding path program 1 times [2023-04-01 00:27:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413673041] [2023-04-01 00:27:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:45,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:45,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413673041] [2023-04-01 00:27:45,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413673041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:45,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:45,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:27:45,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362460569] [2023-04-01 00:27:45,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:45,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:27:45,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:27:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:45,182 INFO L87 Difference]: Start difference. First operand 6103 states and 7705 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)